Hi there. First of all, don't panic! Lots of DCs have tics at some point or another and most of them grow out of them. In fact, most of them grow out of them within a few months. I know it's really hard, but the best thing is to ignore them as much as possible - if your DD senses you are stressed about it, that could make her more anxious which will make the tics worse.
My DS was 5 when he started to get really bad motor and vocal tics (i.e. things he did with his body/face, as well as things he did with his voice.) After a year of ignoring them, I went to the GP who referred him to a consultant who checked for any medical reasons. (There were none). He was then seen by a psychiatrist, who reassured us that most DCs grow out of them & suggested methods to distract / suppress them.
The tics were definitely at their worst between the ages of 7 and 11: they seemed to take over his life and it was incredibly distressing to watch a lot of the time. It was really difficult to stay upbeat and to not let it affect DS' self-esteem, but I think this is really important. Funnily enough, most friends / other children did not seem to notice or make a big deal of it; as parents we notice much more than other people I think.
DS is now a teenager & over the past year they have just faded away. I never thought they would stop, but they have! He occasionally blinks fast with one eye, but that's it. No big deal at all.
(PS - If you want more traffic, you might want to post on the SN board. There will be lots of parents there with experience of tic disorder / Tourettes).